The utility model discloses a gapless -type anti -theft packaging case at bottom of self -adhesion, it includes: top cap, bottom plate, riser, the bottom plate includes infrabasal plate, third bottomplate, second bottom plate, fourth bottom plate, the infrabasal plate sets up the back riser lower part at the packing box, third bottom plate, second bottom plate, fourth bottom plate set up riser, left riser, right riser lower part in the front, the infrabasal plate is trapezoidally, and trapezoidal lower base sets up on the riser of back, the third bottom plate is L shape, is equipped with third bottom plate backfin line, and one side of third bottom plate backfin line is equipped with third bottom plate rubber coating district, the second bottom plate is trapezoidally, with infrabasal plate, the adjacent setting of third bottom plate, the fourth bottom plate is trapezoidally is equipped with fourth bottom plate backfin line on, and fourth bottom plate backfin line one side is equippedwith fourth bottom plate rubber coating district, the utility model discloses a lower cover turns over an order difference and reaches the reutilization on the packing box top cap, and the recycle whohas improved the packing box is rateed, through bottom special construction constitution one shot forming, improved compressive strength, improve packing aesthetic nature.